ksspiegler
22.07.2019 •
Physics
A150 kg mass is on a cliff 50 m high. what is its potential energy? 9 how much work is done moving a 2.5 kg book to a shelf 3.0 m high? 10. a 150 pound man runs up a stairway 25 feet above ground level in 10 s. how much work did the man do?
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Ответ:
W=F*d=mgd = 2.5*9.8*3.0 = 73.7J
W=mgh=68.0*7.62*9.8 =50.78 J
150 lb = 68.0 kg
25 ft = 7.62m
Ответ: